Description

5-[[4'-[[2,4-Diamino-5-[[7-[(4-sodiosulfo-1-naphthalenyl)azo]-8-hydroxy-3,6-bis(sodiosulfo)-2-naphthalenyl]azo]phenyl]azo][1,1'-biphenyl]-4-yl]azo]-2-hydroxybenzoic acid sodium salt is a high-purity, complex azo dye intermediate designed for demanding industrial synthesis. This compound is valued for its exceptional chromophore structure, which provides intense color properties and reactivity for creating specialized dyes and pigments. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries for producing high-performance colorants.

Application

• Primary intermediate for the synthesis of high-grade, polyazo direct dyes and reactive dyes for cotton and cellulose fibers.
• Manufacturing of specialized pigments for inks, including textile printing inks and security inks.
• Used in the production of colorants for paper and other specialty applications requiring a deep, stable hue.
• Potential use as a key precursor in research and development of novel functional dyes and optical materials.
• Employed in the synthesis of dyes for leather coloring and other industrial material coatings.

Basic Information

Product Name	5-[[4'-[[2,4-Diamino-5-[[7-[(4-sodiosulfo-1-naphthalenyl)azo]-8-hydroxy-3,6-bis(sodiosulfo)-2-naphthalenyl]azo]phenyl]azo][1,1'-biphenyl]-4-yl]azo]-2-hydroxybenzoic acid sodium salt
CAS No.	10169-49-0
Molecular Formula	C55H34N10Na4O16S4
Molecular Weight	~1293.16 g/mol (Contact for exact details)
Synonyms	Direct Black 19 (sodium salt); C.I. 35255; Benzoic acid, 5-[[4'-[[2,4-diamino-5-[[7-[(4-sodiosulfo-1-naphthyl)azo]-8-hydroxy-3,6-disulfo-2-naphthyl]azo]phenyl]azo][1,1'-biphenyl]-4-yl]azo]-2-hydroxy-, sodium salt; 5-[(4'-{[2,4-Diamino-5-({7-[(4-sulfonato-1-naphthyl)azo]-8-hydroxy-3,6-disulfonato-2-naphthyl}azo)phenyl]azo}[1,1'-biphenyl]-4-yl)azo]-2-hydroxybenzoic acid sodium salt; Direct Black BN; Azo Black; Tetrasodium 5-[(4'-{[2,4-diamino-5-({7-[(4-sulfonato-1-naphthyl)azo]-8-hydroxy-3,6-disulfonato-2-naphthyl}azo)phenyl]azo}[1,1'-biphenyl]-4-yl)azo]-2-hydroxybenzoate
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality control protocols to ensure batch-to-batch consistency and performance. Quality is verified through comprehensive analytical testing, including HPLC for purity and spectrophotometry for color strength. Certificates of Analysis (COA) detailing purity, impurity profile, and physical specifications are available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of moisture from the air.

Specification

Item	Specification
Appearance	Dark blue-black to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95% (Contact for specific grade purity)
Moisture Content	≤ 5.0%
Ash Content (Sulfated)	Contact for details
Solubility (in Water)	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.